The following three types of chips are produced during metal cutting or machining :
1. Discontinuous chips
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These types of chips are usually formed during machining of brittle materials like cast iron .
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The low cutting speed and small rake angle of the tool are responsible for the formation of discontinuous chips .
2 Continuous chips
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These types of chips are produced during machining of ductile mate rials like mild steel .
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The high cutting speed and large rake angle of the tool will result in the formation of continuous chips .
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These chips are in the form of long coils having the same thickness throughout .
3. Continuous chips with built up edge
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These types of chips are also produced during machining of ductile materials .
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The low cutting speed and small rake angle of the tool will result in the formation of continuous chips with built up edge .
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These chips are also formed when the cutting edge of the tool is dull .
